How do they do it? How are these launcher so bloody awful?

I know you’re out there web devs. Explain to me how it is the Larian launcher is so slow? How does it chug displaying a few images and a run game with vulkan button? The bethesda launcher much the same chugs for no reason at all. Epic, steam, uplay, ea its all the same web client that eats monumental resources but somehow even more than normal.

Valve is not innocent of this depending on the device Ive had issues where big picture mode absolutely crippled my gpu for reasons completely unknown.

How are they all like this? Are the js frameworks really just that heavy now? I miss when steam had native components rip good things i guess. Some of the older web client programs never felt this bad, slack and discord were alright but now everything seems to be competing with Teams for most bloated clunky crap user experience ever.